1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4045aea9751e6bf12d3719c346326a090fac877b171130adfdc6a426b2e113d0. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/894bf779-bb6f-46dd-b99d-57ff96cb5bbe.json and https://artists.proofprofile.net/proofs/artist/894bf779-bb6f-46dd-b99d-57ff96cb5bbe.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb5484e2df63045471513985124b397c5933ca0b384a75b7ccbe1e4bc1ba506b0. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAR41898414.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x69590188a750c7511d4ba7faeb8e8f2e36f0d71df7127e6df245d86b717a9667. Chain 2 (Bitcoin): anchored in block 956484 (2026-07-03T10:47:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAR41977603.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x411a8edacbb0b79ed29b128e4ab6fa932935f79fa3f1b5aa72bfd67e4fb31e1d. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAR41957293.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7f496b8a4158a4c065bdc946c49f7968323d6926caf7229fafd63b916fe1ea63. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAR42074341.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcecd2a5a448fb4a63bba33645af613032efec4f597e0f9a5fea4dc8ab0b41a38. Chain 2 (Bitcoin): anchored in block 959008 (2026-07-21T15:09:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAR42126852.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc57f2911b73fe747f189152bc6f429fd3a56003a8d799dd6663e43de9da060f1. Chain 2 (Bitcoin): anchored in block 956375 (2026-07-02T16:51:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAR42115985.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5beaa249bea12f22ef76b48f2329e71365ed18b9bb94e172d566e2b0bbdcf97. Chain 2 (Bitcoin): anchored in block 956576 (2026-07-04T02:06:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAR42219071.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x57c3d5e59684bb06033707977920161151b382e76d09e547f19f977d9c1a61f3. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAR42373474.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4852f54faf73d8d541f47010264e8872a99b62571d46908cd563a0b7d9e71829. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DE1JN2371540.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc1f686dd7eaea23d0510d1daa624868260a8f23edda6c20cad36eb815c29b44a. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/CH7812417262.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd79df6319163ec1d337dcd1d5df628725c9e35143fe3b4c7b75184531e45ad59. Chain 2 (Bitcoin): anchored in block 953513 (2026-06-13T12:47:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHN92465951.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbba678e94b83d2f49d45f1f300a6cbcd00aaf08c427bea40c9ecdc2cc046b4e7. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZHNC2184258.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd3369c63e8419c9e8371085d042b9108e345783431d0cacf64ab0b83f7dca3. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAR42225199.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1fd3369c63e8419c9e8371085d042b9108e345783431d0cacf64ab0b83f7dca3. Chain 2 (Bitcoin): anchored in block 957120 (2026-07-08T03:22:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/DEAR42225199.